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Patented June 4, 1895.

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S. T. MURGH'IE. PAPER BAG MACHINE.

No. 540,556. 7 Patented Junev 4, 1895.

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S. T. MURGHIE.

PAPER BAG MAOHINE.

No. 540,556. Patented June 4, 1895.

(No Model.) 7 Sheets-Sheet 6.

S. T. MUROHIE. PAPER BAG MACHINE.

No. 540,556. Patented June 4, 1895.

I (No Model.) 1 7 Sheets-Sheet 7.

T MURGHIEQ PAPER BAGMAGHINE. 7 No. 540,555. Patented. June 4, 1895'.-

UNITED-STATES;

"PATE T i Grrrcn.

SYLVANUS T. MURCHIE, OF BATAVIA, ILLINOIS, ASSIGrNOR TO THE WESTERN PAPERBAG COMPANY, OF SAME PLACE.

PA PER-BAG MACH i N E.

SPECIFICATION forming part of Letters Patent No. 540,556, dated June 4, 1895.

Application filed February 5, 18 95. Serial No. 537,329. (No model.)

To all whom it may concern:

Be it known that I, SYLvANUs T. MUROHIE, of Batavia, in the county of Katie and State of Illinois, have invented certain new and useful Improvements in Paper-Bag Machines, of which the following is a specification.- Y

This invention relates to paper bag machines and more particularly to a machine formaking what are designated as self-open,

[0 ing satchel bottom square bags from fiat tubes having bellows 'side folds.

My invention relates more particularly toa paper bag machine iniwhich are employed suction formers for opening the leading end of the tube by a single movement, whereby the side folds of the satchel bottom are produced, in combination withmeans for firmly clamping the body of the blank while the end is being thus opened and the side folds made, and in the employment ofmeanswhereby the end of the bag blank is firmly held until it is caught by the nipper roll or other mechanism for carrying the bags away. Thus, in producing bags upon my improved machine the air is exhausted fromthe suction boxes and the latter in opening separate thesides of the blank by a very rapid movement which causes the sides of the blank to be folded over, and during this opening movement. transversely moving blades having pointed ends are thrust into the bellows fold over one ply of the blank,

and as the formers approach the limit of theiropening movement'the side folds are completed, the line of fold beingdefinedor made 5 straight by drawing the sides tightly over the pointed ends of these blades. These transversely moving blades do not tuckin the sides of the blank at all, but when thrust'in to their full extent serve as formers over which the 40 paper is drawn in making the side folds, thus making a sharp, clearly defined fold; and when the air is out off these blades hold the end of the bag firmly against the former un til by a slight forward movement of the lower 5 former the blank is delivered into the grasp of the nipper roll by which it is carried away. 3

The suction boxes are hinged inplanes, respectively, above and below and parallel to the path of the moving blank. Each box is constructed integrallythat is, having no hinged sections and having no movement except a rocking or. hinged movement upon a fixed axis. The devices which take away the bag consist of a pair of rolls, 'one of which is a nipper roll and has a portion of its body out away so as to permit the, suction formers to rock upon their axes, the parts being so timed that during the movement of the suction boxes the mutilated side ofthe roll is presented toward them. I have also devised amovable 6o platen for flatteningthe end folds against the formers. I have also provided means whereby the blanks travel at a greater rate of speed during a part of their movement, thereby permitting the web of paper to move continuously while the severedblank by its accelerated movement gains sufficient time to compensate for the time lost in the operations upon the blank.

In the acompanying drawings, Figure 1 is a plan view (parts omitted) of that end of the machine on whichthe suction-formers and pasting devices are mounted. Figs. 2 and'3 are side elevations of the same parts, but taken from opposite sides. Figs. 4, 5, and 6 are elevations, partly in section, showing three positions of the formers, with a correspond ing position of the mutilated roll in relation thereto. Figs. 7, 8, and 9 are detail views of the suction-former, Fig. 7 being a front ele- 8o vation showing-the formers open, with the folding blades moved in over the face of the formers; Fig. 8, a side elevation with parts broken away,'and Fig. 9 a rear elevation with the suction-formers closed. Fig. 10 is a plan View showing the movable platen, and the means for supporting and moving the same. Fig. 11 is a detail view showing the means for connecting the transversely-moving blades or formers on one side of the machine. Fig. 12 is a detail view of a section of one of the exhaust-pipes. Figs. 13 to 19, inclusive, show various stages in the formation of the bag.

I have not shown the means for forming the tube and producing the bellows folds in the 5 sides thereof, as these means are well known and many of the parts which I have shown are of ordinary construction and will need no particular or specific description.

The frame work' of these paper bag ma- I00 chines is usually divided transversely, and I have shown that portion or member of the a V V .1.

In the drawings, 20 represents'a supporting frame work whereon is journaled the main driving shaft 21,carrying one of apair of feed rolls 22 which receive the tube 23 from the bellows fold former.

24 represents a pair of feed rolls and between said rolls and the feed rolls 22 the tube is severed into bag lengths by the revolving striker arm 25. The feed rolls 24E deliver the blanks to a second pair of feed rolls 26.

The pair of feed rolls 26, it will be observed,

are much larger in diameter than the rolls 24, and in consequence the bag blankswhen engaged by the rolls 26 are fed forward at' much greaterspced, being separated f rom eachother as clearly seen in Fig. 1. deliver the bag blanks to thesu'ction formers or suction boxes, which are most clearly-shown in Figs. 7 and 8.

lar box-like structures having their faces perforated in defined lines approximating closely to the form of the end of the bag blank during one stage of the operation. These suction boxes are hinged upon horizontal ax-es parallel to and above and below respectively the patlrof the bag blanks. The former 28 is hinged to a stationary block 29 having raised sides 30. The former *27 is hinged to a vertically reciprocating block 31 fitted to move vertically between the raised sides 30 of the block 29 and havinga slot-and pin connection therewith, as shown at 32..

The block 31 is normally held down upon the block 29 by means of the spring 33, having its bearing on the crossbar 34. An arm 35 issecured with theblock 3i and projects outwardly being connected by link 36 with a pivoted lever 37, the latter being adapted to be intermittently vibrated or rocked uponits pivot by means of a camdisk 38, mounted on one of the revolving shafts, presently to be described.

By the means above described the blocks 29 and 31 are adapted to constitute a clamping device whereby one end of thebag blank may be clamped and held while its opposite end is being opened by the suction formers and otherwise operated upon. Means are provided for moving'said suction formers on their hinges so as to open the bag blank, said means comprising links 39, 40, connected to the pivoted levers 4:1, 42, respectively, the pivots of said levers being marked 43, 4:4,1'8' spectively, and said levers carrying anti-friction rollers or other suitable bearings 45, 46, adapted to travel upon cams 47, 48,saideams being in theform of disks secured upon the shaft carrying the upper roller of thepair 26. Springs 49, normally tend to cause the rollers carried by the pivoted levers to contact The feed rolls 26 with the cams and the cam 38 is so timed that as the bag blank is fed forward bythe rollers 26, the block 31 is raised thus bodily lifting the upper former 27 and permitting the bag blank to enter between the formers while they stand in the position shown in Fig. 6. As soon as the bag blank has entered between the suction formers it is clamped by the downward movement of the block 31 and thereupon the earns 47, 48, rock the levers ll, 42, and through the links 39, 40, cause the suction formers 27, 28 to separate. The interiors of said suction formers or suction boxes are exhausted of contained air through the pipes 51, 52, said suction pipes communicating with some suitable air exhausting apparatus as shown at the bottom of Fig. 2. In order to permit said pipes to hex and follow the movements of the formers, I have provided them with telescoping sections 53, 54, having interposed between them the coiled spring 55. The section 53 has a swiveling connection with a hollow stud 57 on the suction box. Of

course a rubber hose or other tube flexible The suction formers are marked, respect ively, 27 and 28.. They are hollow rectangn scoping sections and the spring the movement of the former is provided for, the section 53 having a slidingmovement to compensate for the circular movement of the former during operation. A cut-off must beprovided in said exhaust pipes or at some other suitable point in the air exhausting apparatus. In the drawings I have shown a straight slide valve or cut-off plate 59 carried by a pivoted lever 60 operated by a cam 61 on an intermediate shaft 62. The movement of this valve is so timed with reference to the movements of the former that the exhaust will be cut-oil after the completion of theopening movement of the formers.

The blank as it is fed into the former is shown in Fig. l0,and atthe completion of the opening movement of the formers said blank must be reduced to the condition shown in Fig. ll-that is to say, the leading end of the bag must be opened by the separation of its top and bottom plies, and the bellows sides of the bag must be broken down and folded in over said plies, their edges beingparallel and slightly separated and adapted to be secured together by the folding of theiiaps of the top and bottom plies over said side folds.

The chief difliculty heretofore encountered in the manufacture of these self -opening satchel bottom square bags by the aid of suction formers has been to successfully fold in the side flaps, and so far as I am aware no practical, successful machine has been made prior to my invention for doing this work. It

is one of the features of my invention and of my machine to provide for producing these side folds simultaneous with the opening of the leading end of the bag blanks by the movement of the formers and holding such side folds securely against the formers until the partially completed bag can be seized by the off bearing rolls. To accomplish this I hinge the suction boxes respectivelyabove and below the line of travel of the bag, and open them quickly by a single continuous, positive movement. By this means the side folds are produced without mechanically breaking,

down the paper or forcing any mechanical devices against the paper to define the folds. It is necessary however to clamp the end of the bag blanksecurely against the face of the former so as to hold it in position after the action-of the exhaust has ceased and before. it is seized by the nip'per'roll'. It is also 'desirable to provide a'former over which the paper may be folded, and which will accentuate or define the line offold. The mechanism which I have provided to this end comprises transversely moving blades or formers, preferably constructed in theform of flat plates arranged inpairs and parallel to -the axis of the suction boxes, 'and having their forward ends pointed-'- to adapt them 'to enter the bellows fold ofthe? blank simultaneous with the opening movement of the boxes and to advance as the boxes separate but without actual contact with the paper. These blades holdthe ends of the blank against the suction boxes while the side flaps are drawn over the entering points of the blades by the adhesion of thefiaps of the upper and lower plies of the bag blank to the suction formers'du-ring their separation. These formers are best shown in Figs. 7 and 8, and consist of the flat blades 63 which are adapted'to slide in suitable ways formed in the extensions 64 ofthe boxes 27-, 28, respectively. 7 These blades, as shown have a slot and pin connectionwith the formers, but

this may be varied'as desired. The forward ends of-the blades are pointed, the points being arranged adjacent and parallel to the axis of the suction boxes. They have stems 65, the

- stems being connected in pairs by the curved plate 66 (Fig. 12), carried by the levers 67- pivoted on the brackets 68 and provided with rollers 69 which 'carry cams 7O mounted on the shaft of the upper'roller of the pair 26. The'cams which operate the blades and the boxes being on the same shaft-their simultaneous movement is insured.

A spring 71 normally tends to hold said blades back or at the outer limit of their movement, while the cam imparts a vibrating movement to thelever, thus thrusting the blades inwardly, the

inception -of their inward movement being contemporaneous with the opening movement of the formers. The cam may be constructed 'so as to move the blades in both directions and the spring 71 omitted.

In order to press the folds ofthe side flaps I after they have been formed by the opening of the suction boxes,I-employ-a movable platen having'a reciprocation to and fromthe faces of the-boxes when separated. The

- whereof are marked 81, 82.

relative position of this movable platen with reference to the other parts of the machine is shown in Fig. 2, and a detail plan view of the platen and its operating mechanism is given in Fig. 10. Referring to the latter figure 72 represents a metal bar having slide ways 73 thereon. 74 represents the platen which is in the form of a flat plate carried upon the end of a stem 75, sliding in ways 73. The stem has a pin 76 which enters a slot in a pivotedlever 77, the latter being provided as clearly shown in .Figs. 4, 5, and 6. The

1 purpose of this mutilation or cutting away of -tlie'roll is to enable the suction .formers to move in the arc of a circle which intersects the circular pathof said roll. If th'e'roll 81 -were placed beyond the path of the formers during their opening and closing movements, it would be beyond the position where the nipper carried thereby could grasp the end of the completed bag and hence a reciprocating movement of the suction formers would be necessaryafter the completion of their form ing action. As this reciprocation of the formers entails a loss of time, I have avoided it,

making the formers non-movable or stationary with reference to the path of the blank and give them a slight vertical.movement upon their hinges during the formation of the bag. The nipper is indicated at 83 .and is of usual construction, but located'in this instance along the edge or margin of. the mutilated r0ll.- The movement of these rolls is so timed that during the folding and unfolding movements ofthe formers the mutilated or cut away portion of the roll is presented next to saidformers and the nipper is presented opposite the recess 28 in the lower margin of the former 28. In order to present the lower flap of the bag blank to the grasp of the nipper the cam 48 may be provided with a recessed portion in which the roller 46 enters, thus allowing the former 28 a greater portion of its bodybeing removed IIO to rock slightly on its pivot, as seen in Fig.

5, by which means the nipper is enabled to grasp the lower flap of the blank,but this movement is not necessary. By the continued revolutionof the mutilated roll the blank is withdrawn from the grasp of the formers and is passed through the paste rolls 8%, 85 and thenceto the folding rolls 86, 87.

In order to render the description of the operation of forming the bag intelligible, refer ence is made to. Figs. 13 to 19 inclusive.

Fig. 13 shows the blank in the form of a flat tube, the leading endof the blank having four slits a, the portions between said slits constituting top and bottom flaps b which are acted upon by those portions of the suction formers nearest their outer or free margins. The leadingend of :the blank being passed exhausted from the boxes.

flaps b, thus-defininglthe fold lined. During the folding of the flap c the bladestenter into the triangularrspace between the :fiaps c and the folds e, the interior boundaries of this? space being shown bythedotted lines in Fig. The folds e are, therefore, held tightly 15. against the facesof the formersand the folds thus produced on the dotted lines by the breaking of the paper, due to .the inward fold of the flap 0. The folds which are indicated by the dotted lines of Fig. 15;areaccentnated by the paper being pressed :down over the points of the formers, but it will be understood ithitl] the movement of the blades is so timed that they do not,or at least, shouldnot contact with .the paper at the bottom of such fold.

Afterthe bag has beenbrough t *to-thecondh tion shown in Fig. "15, the platen-strikes the flaps 0, thus flattening them down.

ing the lower flap binto-the graspiofttheinipper roll, and theblank passesoif betweenthe nipper roll and its bed roll to the paste rolls,

and the line .of paste f :is applied,.as @shown in Fig. 16.

After the paste is applied the end flapis folded down upon the body,as shown inFig. 17, and then the blind fold g is'made which lays the other fiap b overupon the flaps .c, as shown in Fig. 18. The bag is thus completed and is delivered from the machine in 11116 .001!- dition :shown in Fig. 19.

I have shown and described my improvements as co-acting mechanisms,but obviously some of said devices may beemployed in machines having co-acting mechanisms of other construction thanare described,:and it will also be understood that all of the devices which I have shown are not necessarily employedin the described relation to each other, i as for example, while I prefer in all cases'to employ the movable platen its use may be dispensed with, and while the transversely moving blades or formers are employed in connection with suction boxes which have axial movement only, such blades might be.

employed in conjunction with reciprocating suction formers, and therefore the claims hereinafter made are not restricted or limited in their broader scope to the combination of.

Then the lowerformeris rockedforward slightly, bringable, and means for moving said boxes upon their axes, substantiallyas described.

2. In a machine for making paper bags,

the combination of the following instrumentalities, namely, suction formers, means for feeding the forward ends of flat tubular blanks between said formers and for clamping the opposite ends of said blanks, means for moving the formers-on their axes by a single continuous movement, whereby the leading ends of the blanks are opened, means for holding :the folds inlthe forming end of the bag againstcthe faces ofttheformers and means :for memoving the partially completed bag,

substantially .as described.

3. llnapaperbagmachine, the combination .with-suction iboxes .hingedbn fixed axes parallel 'to the path of the bag blank, means for moving said boxes upon-their hinges .to open the end "of the blank and transversely moving blades or formersadapted to hold the end it of the blank against .the face of the formers, substantiallyzas described.

4. .In a paperbagmachine, the combination with hinged suction boxes, of two pairs of transversely .moving blades, and a yoke connecting-the ionterends of said blades in pairs :and means for reciprocating said blades to cause themito move over the faces of the suction boxes, substantially as 1 described.

.5. Inapaper bag machine,the combination with suction boxes .hingedand movable upon .fixedaxes parallel to the path of the blank, of transversely moving blades adapted to enter the sides of the bellows fold of the blank, means for moving the suction boxes on theiraxes, and means for simultaneously moving theblades,substantially as described.

6. [n agpaper bag machine,the combination with the-suction boxeseachconstructed from a single section hinged in planes parallel to .for taking away the partially completed bag,

said several means being actuated in due order and relation, substantially as described.

7. In a paper bag machine, the combination with suction boxes hinged on axes parallel to each other and constructed in a single section, means for moving said boxes on their axes into a plane at right angles to the plane of movement of the bag blank whereby to open prising a pair of rolls, one of which has its.

body mutilated or cut away, and a nipper for seizing the blanks substantially as described.-

9. In a paper bag machine, the combination with hinged suction boxes adapted to open the leading end of a bag blank, of means for withdrawing the blank from the boxes comprising a pair of rolls, one of which has its body mutilated or cut away, and a nipper arranged at the margin of such mutilated portion, substantially as described.

10. In a paper bag machine, the combination with hinged suction boxes and cam actuated means of moving them on their hinges, of

transversely moving blades and a cam for actuating said blades, the actuating cams for i the boxes and the blades having a common axis whereby the simultaneous movement of said parts is insured, substantially as described.

11. In a paper bag machine, having suction boxes for opening the leading end of the blank, of exhaust pipes for said boxes, said exhaust pipes having telescoping sections and a swivel connection with the boxes, substantially as described.

12. In a paper bag machine a hinged suction box and an exhaust pipe connected therewith, said pipe having a swivel connection with the box, telescoping sections and a spring having a bearing upon said sections respectively, substantially as described.

13. In apaper bag machine, the combination with means for forming and severing a tube into bag lengths, of suction boxes for opening the leading end of the blank and feed rolls for the tube and for the bag lengths, the latter being adapted to move the bag lengths at a greater rate of speed than the tube is moved, substantially as and for the purpose described.

SYLVANUS T. MURCHIE.

Witnessesr C. C. LINTHICUM, N. M. BOND. 

